package cn.yunhe.biz;

import java.io.IOException;
import java.util.List;

import cn.yunhe.entity.Book;
import cn.yunhe.entity.Cart;
import cn.yunhe.entity.Course;

public interface Bookbiz {
	public List<Book> findAll() throws IOException;
	public Book findbookbyid(String id) throws IOException;
	public void deletecartitem(String id,Cart cart) throws IOException;
	public void clearcart(Cart cart) throws IOException;
	public void changequantity(String sid, String quantity, Cart cart) throws IOException;
}
